Interfacial evolution of a spherical particle in a uniaximal straining flow

The growth behavior of a spherical particle in undercooled melt,affected by uniaxial straining flows,is studied.The analytical solution obtained by the matched asymptotic expansion method shows that the uniaxial straining flow effect results in higher local growth rate near the surface where the flow comes in and lower local growth rate near the surface where the flow goes out,and that the uniaxial straining flow causes an initially spherical particle to evolve into an oblate spheroid.